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Don't traverse text nodes during styling.

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MozReview-Commit-ID: 6CtQMxbcLnF
This commit is contained in:
Bobby Holley 2016-10-25 19:50:31 -07:00
parent 1cfd5e8172
commit 1090abae87
7 changed files with 72 additions and 31 deletions
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14
components/script/layout_wrapper.rs
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@ -763,6 +763,9 @@ impl<'ln> NodeInfo for ServoThreadSafeLayoutNode<'ln> {
}
fn is_text_node(&self) -> bool {
// It's unlikely that text nodes will ever be used to implement a
// pseudo-element, but the type system doesn't really enforce that,
// so we check to be safe.
self.pseudo == PseudoElementType::Normal && self.node.is_text_node()
}
@ -802,11 +805,18 @@ impl<'ln> ThreadSafeLayoutNode for ServoThreadSafeLayoutNode<'ln> {
}
fn style_for_text_node(&self) -> Arc<ComputedValues> {
// Text nodes get a copy of the parent style. Inheriting all non-
// inherited properties into the text node is odd from a CSS
// perspective, but makes fragment construction easier (by making
// properties like vertical-align on fragments have values that
// match the parent element). This is an implementation detail of
// Servo layout that is not central to how fragment construction
// works, but would be difficult to change. (Text node style is
// also not visible to script.)
debug_assert!(self.is_text_node());
let parent = self.node.parent_node().unwrap();
let parent_data = parent.get_style_data().unwrap().borrow();
let parent_style = &parent_data.current_styles().primary;
ComputedValues::style_for_child_text_node(parent_style)
parent_data.current_styles().primary.clone()
}
fn debug_id(self) -> usize {